System for control of boilers or the like



Sept. 6, 1927.

G. H. SEELY SYSTEM FOR CONTROL oF BOILERS 0R THE LIKE Filed May 23. 1925 l 2 Sheets-Sheet l` ,I @mi w. im@

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O Y 1,641,934 Sept. .6, 19'27. G. H' SEELY SYSTEM FOR CONTROL OF BOILERS OR THE LIKE Filed May 23. 1925 2 Sheets-Sheet E INVENTR.

ZEN/v I A7. S5504 ATTORNEY.-

,Patented Sept. 6, 192.7.

UNITED STAT sGLENN H. saam,

Es PATENT l 1,641,934 oFFIcE.

or AKRON, onto.

'SYSTEM roR'ooNTnoL or Bomans on THE LIKE.`

Application inea May as, 1925. serial No.l 32,413.

production. 1 Theinvention comprises a plu.r

rality oi interconnected and interdependent instrumentalities which are automatically and accurately controlled. i

Inthis'application is shown one embodiv ment of the invention, it being understood, however, thatchangfesv and moditications may beresortedto withinthe scope of the invention.

In thev drawings:

Figure 1 Vis a d'agrammatic view of the complete installation as adapted for a single steam boiler unit Figure 2 is a side elevation oit the'control device yand i,

Figure 3 is a plan .view thereof. i j Y In the drawings, the boiler or furnace is indicated by the numeral 1, the main steam line being indicated by the numeral 2 and a 'mechanically operated (Stoker of any preit'erred type being indicated by the numeral 3.- A pipe l is set inthe wall of the'boiler and opens at Lits inner end over the lire bed.

This pipe l is brought outwardly from the lire bor; and is opened into a bell, the lower end oi' which is immersed in anoil bathV 6 in a reservoir 7.`

The bell 5 is carried upon one end oi al pivoted scale beam 8, the other end of which supports a second bell 9 dippingk into the oil` bath 1() in a reservoir V11, the two reservoirs being connected by a pipe 12. The bell 9 serves, therefore, as an equalizer or balance for the bell 5. Rocking of thebeam 8 is limited by set screws 13. The bell 5 is subjected to the diierences in pressure existing in the fire box above the tire, and when the pressure Within the furnace abovethe tire is low, the bell 5 will be depressed, andrwhen ,the pressure builds up in the fire box, the bell is raised, and the rocking of the scale beam 8 is utilized to control the f various instrumentalities within the system.

The scale beam 8 is provided with an adjustable pin'15 which is located on the end of the arm carrying` the bell 9 and this pin is situated beneath and adapted to operate a valve 16 which admits air Jrom the pressure line 17 which is supplied with compressed air from any suitable source, through a separator 1S.` Then the pressure within the furnace is low the bell 5 is drawn downwardly, opening the valve 16 and admitting air under pressure from the line 17 to the line 19 by which it is conducted to the upper side of a piston 20. rlhe piston 2O is connected by a rod 21 with the damper 22V in the stack 23 so that the damper will close or open as the pressure decreases or increases, respectively. it the saine time that the damper is regulated in the manner described, it is advantageous to regulateY the speed of thestolrer so that more or less coal will be supplied to` the grate.. This is accomplished by a chain 244 which is connected at one endto the rod 21 and at the other to apivoted and weighted lever 25 which controls the governor 26. or the engine which operates the Stoker 3, the laction being such that as the pressure decreases the stoker will be retarded and a thinner vbed of, coal will be laid upon the grate. f

n actual lpractice kthe various elements balance so nicely that there is very little variation in the operation of the furnace.

n connection with the regulationot1 stack, damper and the stol'rer, the installation also makes provision for the regulation of the fan andthe damper in the draft passage from the fan to the grate. Vlin the present installation this is accomplished from the header 27 on the steam line, by means of a small pipe 28 connected with a pressure regulating valve indicated at 28EL controlling iiow of air from the supply line into two branch pipes 29 and 30. The former branch. leads to a diaphragm valve ywhich controls the passage et steam through thesteam line 32to the turbine 33 which operates-the fan 311i. rlhe branch .leads to a diaphragm 35 which, through lever mechanism 36, operates the damper 37 located withinV the main air duct 38 from the fan to the furnace. In this manner the steam pressure in the header 27 controls the speed of the fan and the amount of air entering the fire box. rThe amount of air forced within the fire box by the fan also directly affects the pressure above the fire and in this manner the whole system is coordinated and regulated to obtain evenness oi operation and etliciency.

The system of the invention is adapted for accurate control due to the vincremental lll) movement or the controlling air valves which have lno inoperative movements and which eperule llie rin-loue nieeluu'n'sine4 directly nilliou "llie nilerveiiion el levers, linke, ele.

n'birli ure subie/eli lo Considerable lont inofion. ilie ronrol devices :ire zulzipred lo be inounl'eil reniolel;Y from lie boiler. 4ll obvioufi fluit liuving explained tbe iiwention eo limi i'` nuiy be unile 'eooil by those skilled En tbe uri', elninges und niof'liliezilliou4 niej?- be meile, nliieli, lu'nvei'er, 'will einboily ille lleuures olf 'lie ini'euiion wiliin tbe scope ol' Jelle @lilium uppenileil lier-elo.

lllliei is rluiineil is:

1l. lu eonibiimlion willi :i boiler, a` me rliziui 'ail elolier, en iuljuebible flue iluinper, :i len, :riluel euleiulinp' vlroin ilie bin lo lie boiler. :in :ulliufeluble :iir supply iluniper in mid iliul" menne i'oi Controlling' the speeil oil? fne @loller uniljlfor :Lillie-aline; i'be line demper, Suid' ineens: being operable by Ylniil preeeure eonirollefl by pressure of gefiel: uboi'e the lire pol ol tbe boiler, rfi-inne 'for controlling' llie speerl, oil" tbe len zinfl ineens' ler inline-ling' ille oir sui'plj,7 {lainipeiu eueb ol Seid lusbnannell mee-.ns being' opereble by lluiil presmire controlled bjr' leliif'ery ol. eeinn il'roin llie boiler, ezieli ol euill control ineens oper-ailing? iiulepenllenl'lyY ol l'lie oilier, :i lluill ifwessure supplying sijyslenn eoi'ineeione lberelroin lo lie first' eonl'rol ineens, :1 Vuli'e in eziiil eonneelions operable by pressure of rosiers above tbe lire box'. eonne'f'ions` 'bein llie l'liiii'l preferire Supplyv sysein lio ezieli oil? l'lie yeeeonil control ineens, unil i single regnlzilor For tbe eupplj; ol ziir pressure lliroiilffi bolli lzisi1-nunieil eimnerlions, will regi'uluiior beine' operiible by delivery oil el'euni 'from iln boiler.

lin eoinbinulion n'iili :i boiler` n ineelniniif'il el'olzer,` en eflfueluliile Vllue Juniper, n 1blu, u. llur extending vlroin tbe Fen lo ilse bollen :iu mljuslebli'f oir Supply ilziinper iu eziiil (biet. ineens lor controlling lie speed ol the :il'olier unil 'lor :uljueiingr libe V(lne ilzunper, miel ineens being! operable b vluiil presisure controlled by pressure of i above lille lire porv ol l'lle boiler, nieuns 'For ronrrollingillie npeeil oll the len unil ineens for :iiljuelinu' lie oir supplyv demper. efieh ol? sniil lziSl-.nznnefl means beine' operable by fluid pressure Controlled by Cleli'very of elenni lroin tbe boiler, :i fluid pressure supplying system, connections; lbere'i'roni to the lli-:fit eoi'rtrol ineens, a vulve in :uid eonneetiene operable by pressure o'lj' gases above ClieA lire box, eonneetione 'from llie fluid pressure Supply eysl'eni to ezieli ol? ille second control ineens, sind, :i singleregulator l'for the supply of zur preeenre lliri; ugl1 botli lust-ninneil conneel'ions, mid regulator being operuble by delivery of gleam from lie boiler.

Sl. ln eonibinution with :i boiler,r ai me elnini 'el eloler en adjustable iflne demper, ii einer, for delireringv nir to lie boiler, un :nl iusbibli :iir supply demper in .Quill duel, nieune for eirnl'rollingl libe speed oli' tbe stolzer :1i-irl Al-or urljueting tbe flue demper, eziii'l inminebeing` operable by Huid pressure Coulrollefl by prerisure ol: grises above l'ne lire poi ol? llie boiler, ineens lor `adjusting lbe nir Supply lenifier1 saicl lust-named menne being operi ble by 'lluiil pressure controlled by delivery olt sleiinl lfronl 'lie boiler, :i lluiil prefienre supplying syrslein, eoniiectious; l'lierelroin lo 'be first control Ineens, a vulve in enifl onneelilons ope able b y izressure oli gases: above tbe .iii-e box, connections frein llie lln'ul pressure supply System ilo libe .sew mul eon'rol ine-aina :ind :i single regulutor lo; libe supply ol" nir pressure through ille lesbnui'nefl e nineelions1 Suid regulator beinglv operable by delivery of eleznn from tbe boiler.

4.-. ln combinution Willi :i boiler` zi, neeliuuiezil Stoker, un :u'ljusluble flue ilznnper, :i lrin, :i duet extending 'from lille lien lo ene boiler. :in :uljuelable uir ,supply Juniper in .Quill duet` menus for controllingr llie speed of llie sioler unil for adjusting tbe flue deijuper, sziii'l ineens being' operz ble by prefi- Sure ol' .ezines :ibore tbe lire poll of lbe boiler, ineens for mimirolling ille Speed oil. {,lie l'zin, :inrl inezinn for adjusting the nir .fsuppliyv iliuuper, urli o1. Said last-named ineens lie-- ingr ope able by deliver)7 ol2 sl'einn from tbe boiler` ezieh of Suid control in mns operzilinp imlepeni'lentljf ol i'lie ollior.

GLENN H. SEELY. 

